Improvement in door-springs



To all whom it may concern:

waited 5ta-tre @anni @imita STEPHEN ELLIOTT, '0F RICHMOND, INDIANA.

Letters Patent No. 91,528, dated Jme 22, 1869.

IMPROVEMENT IN DOOR-SPRINGS.

The Schedule referred to in these Letters Patent and making pm 0f uw m5,

Be it known that I, STEPHEN ELLIOTT, of the cityof Richmond, county of Wayne, and State of Indiana,

' have invented new and useful Improvements in Door- Springs; and I do hereby declare that the following is a full, clear, and exact description thereof, reference beingk had to the accompanyingf drawings, and to the letters of reference marked'thereon.

The nature ofv my invention consists in providing a Acircular door-spring with a forked vibrating piece of p metal, and also providing the circular rod on which the spring works with a.permanent plate at eachend. To enable others skilled in the art .to make and use my invention, I will proceed to describe its construc- Figure l is the door and frame.

Figure 2 is a circular spring on a bent rod, with a plate at each end.

` 1 `a hole in the piece G in g. 3.

Construction.

I make my spring of brass or steel wire, of suitable size toslip easily on a-rod of iron ive-,sixteenths of an inch in diameter, and bent to a circle, or segment of a circle. For a gate, it requires to be about threefourths of a circle, .The plates F F are rmly secured to the ends of the rod E. .The plates F E are then screwed on the door-frame. The spring D, encircling the rod E, is held to its place by the plates F F. The piece G is secured to the door by means of the screws I, which allow it to vibrate, so that it will work on an irregular circle.

' Operation.

When the door is closed, the spring D presses against the vibrating piece I, and holds the door shut, and, as the door is opened, the vibrating piece I pushes back the spring D.

l do not claim applying a circular' spring to a door and frame. Neither do I claim working the lspring on a bent rod, as I am aware that they have all been used before.

I am aware of the patent to B. F. VWhitaker; and

What I claim as an improvement on his patent, is-

Therstationary circular rod E, attached at both ends, with its supporter D, when used to contract the spring, in combination with spring D and plates F F, as constructed and shown, for the purpose set forth. v

' STEPHEN ELLlOTT.

Witnesses:

Tnos. N. YOUNG, .lHos. A. DUGDALE. 

